Collapsible draw-bar pattern



(No Model.)

3- snea -sheet '1.

W. 1;. WAKEFIELD. COLLA PSIBLE-DRAW BAR PATTERN.

No.- 392,243. Patented Nov. 8, 1888.

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OOLLAAPSIBLE DRAW BAR PATTERN.

No. 392,243. Patented Nov. 6, 1888.

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(No Model.) 3 Shets-Sheet 3.

W. EQWAKEFIELD. GOLLAPSIBLE DRAW BAR PATTERN.

N0. 392,243. r Patented NOV. 6, 1888.

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1 UNITED STATES. PATENT FFICEO \VILLIAM E. WAKEFIELD, OF CHICAGO, ILLINOIS.

COLLAPSIBLE DRAN-BAR PATTERN.

SPECIFICATION forming part of Letters Patent No. 392,243, dated November 6, 1888. Application filed July 24, 1888. Serial No. 280,933. (No modelll To all whom it may concern.-

Be it known that I, WILLIAM E. WAKE- FIELD, a citizen of the United States, and a resident of Chicago, county of Cook, and State of Illinois, have invented new and useful Improvements in Collapsible DraW-Bar Patterns, of which the following is a specification, reference being had to the accompanying drawings, illustrating the invention, in which- Figure 1, Sheet 1, is a longitudinal elevation of a mechanism embodying myinvention; Fig. 2, Sheet 2, a plan view of Fig. 1; Fig. 3, Sheet 3, an elevation of the left-hand end of Fig. 1, with flask removed.

The purpose of this invention is to facilitate the molding of draw-bars and other like articles and prevent the breakingdown of the mold by the removal of the pattern. This I accomplish by a suitable box-frame, which is open at the top and bottom and divides the cope from the drag, and into which the pattern is drawn from the cope and drag. The pattern is made in two parts, and between the parts are a series of levers by which the said parts are drawn to or spread from each other, the parts being spread apart when the mold i ng is done and drawn together when the pattern is to be removed from the mold.

D is the cope.

E is the drag.

A-is the box-frame, which is open at the top and bottom and lies between the cope and drag and forms the parting-line between the molds S P, Fig. 1.

I is the contour of one side of the draw-bar pattern, and I is the other fiat side.

B B show the two-part pattern, which is connected together by levers, as follows:

h h are metal supports, which are bolted to the box-frame A and hold metal frame-pieces 3 in position.

jj represent studs, which are secured to the pattern B B at opposite sides thereof, and to which are jointed levers J J, having a central knuckle-joint connection at 2. The lever J has a joint-connection on the metal frame 3 at 4. Levers 5 6 have a knuckle-joint connec tion at 7, and lover 5 has a joint-connection at 4, and lever 6 a joint-connection on the stud j. A lever, i, is jointed to a stud, r, on the frame A and to a crank-lever I and the lever I has a joint on a bracket, d, attached to the metal frame 3, and is jointed to a lever, f. The lever f is jointed to a lever, F, which is pivoted to the iron frame 3 at S. The lever is is jointed to lever F and to a lever, K", the latter being pivoted to an elbow-bracket, 0, attached to the frame 3. The lever K is also jointed to a stud, p, on the pattern.

The levers 10, 11, 12, and L are the duplicates of the lovers J, J, 5, and 6 in construction, except they are shorter to connect the narrower portion of the pattern. The connection between the lovers i I is slotted, and pivoted to the lover I is a catch-bar, 13, which is employed to start the levers from their centers by hooking onto the lever J. By the movement of this lever by said catch-bar the lever J is moved and the toggle-levers 5 6 are tripped. The toggle-levers 1O 11 are tripped in like manner by the catch-bar 14 on lever 12 at the narrower end of the pattern, said latter catcl1- bar engaging a notch in the lever 12. A strong stud, N, is secured to frame A, and to it is pivoted a lever, M, and to this lever is pivoted a connecting-rod, F, the inner end of which is jointed to lever F, so that when the lever M is moved in the direction of dart 15 the levers described will move in directions, as indicated by darts, to collapse the pattern.

T T are metal guides to prevent the pattern from rocking.

a is a lever-stop to govern the collapse.

To use the expanded pattern, place it with its box-frame A between the two flasks. Ram one side, and reverse the flasks and ram the other side. Then draw the two-part pattern together, lift off the cope and lift out the pattern. Then bring the cope and drag together.

I claim and desire to secure by Letters Pat ent of the United States" 1. The box-frame A, open at its top and bottom to permit the two-part pattern B B to be extended through said openings, in combination with a frame part, 3, extending longitudinally within the box-frame, and an exterior lever and a connecting draw-bar, and twopart levers operativel y connected to the drawbar and to the two levers which operate the two-part pattern, as specified.

IOO

2. The combination of the box-frame, a two part pattern, 13 B, the metal frame 3 within the frame A, the draw-bar F, the centrallypivoted lever F, exterior lever, M, brackets d V a T 5 0, attached to frame 3, the levers 1O 11 L 12, i WILLIAM AKDFIDLD' connecting the narrow end of the pattern, the Witnesses: levers 5 6 J J, connecting the wide end there- G. L. CIIAPIN, of, and the intermediate levers, i P f F K ANNA D. J OHNSON.

k Z, and the connections 13 14, to throw the levers off their centers, as and for the purpose IO specified. 

